WO2003064209A1 - A side tarpaulin for a wafter - Google Patents

A side tarpaulin for a wafter Download PDF

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Publication number
WO2003064209A1
WO2003064209A1 PCT/FI2002/001018 FI0201018W WO03064209A1 WO 2003064209 A1 WO2003064209 A1 WO 2003064209A1 FI 0201018 W FI0201018 W FI 0201018W WO 03064209 A1 WO03064209 A1 WO 03064209A1
Authority
WO
WIPO (PCT)
Prior art keywords
supporting structure
side tarpaulin
reinforced areas
fabric
tarpaulin
Prior art date
Application number
PCT/FI2002/001018
Other languages
French (fr)
Inventor
John Finell
Original Assignee
Walki Wisa Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Walki Wisa Oy filed Critical Walki Wisa Oy
Publication of WO2003064209A1 publication Critical patent/WO2003064209A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • B60J7/08—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position
    • B60J7/10—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs of non-sliding type, i.e. movable or removable roofs or panels, e.g. let-down tops or roofs capable of being easily detached or of assuming a collapsed or inoperative position readily detachable, e.g. tarpaulins with frames, or fastenings for tarpaulins

Definitions

  • the present invention relates to a side tarpaulin for a swap body, the tarpaulin comprising a supporting structure and a layer attached to the supporting structure on both sides of the supporting structure.
  • the wall material of a swap body is strong enough to meet the valid norm as described below. It would be preferable to manufacture this kind of wall structure from a foldable material such as fabric, but the existing fabrics do not meet the requirements of the norm.
  • a side tarpaulin for a swap body it is possible to produce a sidewall material that meets the requirements of the norm.
  • a side tarpaulin according to the invention is characterized in that the supporting structure of the side tarpaulin comprises reinforced areas, so that its bulge according to the test method DIN 12641 does not exceed 300 mm.
  • other advantages of the side tarpaulin are its foldability and flexibility.
  • the test used to measure side fabrics is as follows: a fabric, 150 cm in width and 250 cm in height, is fixed in jaws without pretensioning.
  • the side fabric is loaded with a horizontal 80 cm long bar with a force of 9.81 kN (1000 kp) for 120 seconds.
  • the bulge of a side fabric with respect to a vertical line from the centre should not exceed 300 mm.
  • a side tarpaulin according to the invention comprises reinforced areas, which prevent the side tarpaulin from bulging more than 300 mm.
  • the entire supporting structure of the side tarpaulin is preferably manufactured by weaving, and the reinforced areas are preferably formed in the direction of the weft of the fabric. It is also possible to have reinforced areas in the direction of the warp.
  • the preferred weave used for this purpose is twill, although other weaves can be used as well, and the weave may also be changed in the supporting structure, for example, in a reinforced area.
  • the bulge of the side tarpaulin could, of course, also be controlled by reinforcing the supporting structure throughout, but in this case the easy foldability would be lost. It is in fact preferable that the distance between the central points of the reinforced areas is 300-500 mm and that the length of the reinforced areas is 65-70 mm.
  • the supporting structure is reinforced by using yarns made of special high- strength fibres.
  • Such fibres are, for example, para-aramid fibres or high- modulus polyethylene fibres.
  • Trade names for para-aramid fibres are, for example, Kevlar® 49 (DuPont, Switzerland), Twaron® ST 1000 (Teijin, Japan), and Technora® (Teijin, Japan).
  • Trade names for high-modulus polyethylene fibres are, for example, Spectra® 900 (AlliedSignal Performance Fibers, USA), Spectra® 1000 (AlliedSignal Performance Fibers, USA), and Dyneema® SK65 (Toyobo, Japan).
  • the breaking strength of the said fibres is at least 2700 N/mm 2 and their breaking extension less than 5%.
  • the supporting structure is laminated on both sides with at least one plastic film, producing a side tarpaulin that is waterproof and easy to clean.
  • the edges of the side tarpaulin may be folded over to make a reinforced edge, and suitable fastening members are attached to them in order to secure the side tarpaulin to a swap body.
  • Figure 1 shows the supporting structure of a side tarpaulin, viewed from the side.
  • FIG 1 the direction of the warp of the supporting structure of the side tarpaulin is indicated by the arrow V and the direction of the weft with the arrow H.
  • the fabric shown in Figure 1 was woven in such a way that a 1350 dtex multifilament yarn made of polypropylene (PP) was used as the warp yarn.
  • the minimum breaking strength of the yarn was 75 N, and its breaking extension 22-27%.
  • the warp density was 80 yarns/10 cm.
  • Two successive areas were formed in the fabric in the direction of the warp by using different kinds of weft yarns in these areas.
  • every other weft yarn used was a polypropylene tape of 1250 dtex, and every other weft yarn was the same yarn as the warp yarn.
  • the density of the weft yarn was 76 yarns/10 cm.
  • the length of area 1 in the direction of the warp was approximately 430 mm.
  • Area 2 was formed by using the same yarn that was used in the warp as the weft yam, but using the weft yarn double and together with para-aramid yarn (Kevlar®). The length of area 2 in the direction of the warp was approximately 65-70 mm.
  • a fabric was obtained with a theoretical minimum breaking strength of 29.4 kN (3000 kp).
  • the fabric was laminated on both sides with a plastic film, preferably with a polypropylene film.
  • Appropriate fastening members were attached to the finished side fabric so that it could be secured to a swap body.
  • a typical application of a side tarpaulin is its use as a side tarpaulin for an articulated lorry, in which case the height of the side tarpaulin can be approximately 3 metres.
  • the side tarpaulin is placed as the sidewall of the swap body in such a way that the reinforced areas reach from top to bottom.
  • the supporting structure of the side tarpaulin is a woven fabric in which reinforced areas have been formed with the weft yarns, the direction of the warp of the fabric will run substantially parallel to the direction of the vehicle.
  • reinforced areas may be separately woven tapes that are attached to the side tarpaulin in an appropriate manner.
  • the weave, density, and materials of the woven supporting structure may differ from those described above.
  • Yarns containing special high-strength fibres are not necessarily formed solely of high-strength fibres, but there may be other fibres mixed into the yarn.
  • the most important feature of the present invention is that the supporting structure of the side tarpaulin is reinforced in such a way that it will not bulge more than the permitted amount when loaded.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Pallets (AREA)
  • Woven Fabrics (AREA)

Abstract

A side tarpaulin for a swap body that comprises a supporting structure and a layer attached to the supporting structure on both sides fo the supporting structure. The supporting structure of the side tarpaulin contains reinforced areas in such a way that its bulge according to the test method DIN 12641 will not exceed 300 mm.

Description

A side tarpaulin for a- after
The present invention relates to a side tarpaulin for a swap body, the tarpaulin comprising a supporting structure and a layer attached to the supporting structure on both sides of the supporting structure.
When transporting relatively light loads such as beverage crates or household appliances, it is sufficient that the wall material of a swap body is strong enough to meet the valid norm as described below. It would be preferable to manufacture this kind of wall structure from a foldable material such as fabric, but the existing fabrics do not meet the requirements of the norm.
With a side tarpaulin for a swap body according to the invention it is possible to produce a sidewall material that meets the requirements of the norm. A side tarpaulin according to the invention is characterized in that the supporting structure of the side tarpaulin comprises reinforced areas, so that its bulge according to the test method DIN 12641 does not exceed 300 mm. In addition to the fact that the bulge of the side tarpaulin does not exceed the permitted limit, other advantages of the side tarpaulin are its foldability and flexibility.
The test used to measure side fabrics is as follows: a fabric, 150 cm in width and 250 cm in height, is fixed in jaws without pretensioning. The side fabric is loaded with a horizontal 80 cm long bar with a force of 9.81 kN (1000 kp) for 120 seconds. According to the norm, the bulge of a side fabric with respect to a vertical line from the centre should not exceed 300 mm.
A side tarpaulin according to the invention comprises reinforced areas, which prevent the side tarpaulin from bulging more than 300 mm. The entire supporting structure of the side tarpaulin is preferably manufactured by weaving, and the reinforced areas are preferably formed in the direction of the weft of the fabric. It is also possible to have reinforced areas in the direction of the warp. The preferred weave used for this purpose is twill, although other weaves can be used as well, and the weave may also be changed in the supporting structure, for example, in a reinforced area. The bulge of the side tarpaulin could, of course, also be controlled by reinforcing the supporting structure throughout, but in this case the easy foldability would be lost. It is in fact preferable that the distance between the central points of the reinforced areas is 300-500 mm and that the length of the reinforced areas is 65-70 mm.
The supporting structure is reinforced by using yarns made of special high- strength fibres. Such fibres are, for example, para-aramid fibres or high- modulus polyethylene fibres. Trade names for para-aramid fibres are, for example, Kevlar® 49 (DuPont, Switzerland), Twaron® ST 1000 (Teijin, Japan), and Technora® (Teijin, Japan). Trade names for high-modulus polyethylene fibres are, for example, Spectra® 900 (AlliedSignal Performance Fibers, USA), Spectra® 1000 (AlliedSignal Performance Fibers, USA), and Dyneema® SK65 (Toyobo, Japan). The breaking strength of the said fibres is at least 2700 N/mm2 and their breaking extension less than 5%.
The supporting structure is laminated on both sides with at least one plastic film, producing a side tarpaulin that is waterproof and easy to clean. The edges of the side tarpaulin may be folded over to make a reinforced edge, and suitable fastening members are attached to them in order to secure the side tarpaulin to a swap body.
The invention is illustrated below by way of an example and Figure 1 , which shows the supporting structure of a side tarpaulin, viewed from the side.
Example.
In Figure 1 the direction of the warp of the supporting structure of the side tarpaulin is indicated by the arrow V and the direction of the weft with the arrow H. The fabric shown in Figure 1 was woven in such a way that a 1350 dtex multifilament yarn made of polypropylene (PP) was used as the warp yarn. The minimum breaking strength of the yarn was 75 N, and its breaking extension 22-27%. The warp density was 80 yarns/10 cm. Two successive areas were formed in the fabric in the direction of the warp by using different kinds of weft yarns in these areas. In area 1 every other weft yarn used was a polypropylene tape of 1250 dtex, and every other weft yarn was the same yarn as the warp yarn. The density of the weft yarn was 76 yarns/10 cm. The length of area 1 in the direction of the warp was approximately 430 mm.
Area 2 was formed by using the same yarn that was used in the warp as the weft yam, but using the weft yarn double and together with para-aramid yarn (Kevlar®). The length of area 2 in the direction of the warp was approximately 65-70 mm.
A fabric was obtained with a theoretical minimum breaking strength of 29.4 kN (3000 kp). The fabric was laminated on both sides with a plastic film, preferably with a polypropylene film. Appropriate fastening members were attached to the finished side fabric so that it could be secured to a swap body.
A typical application of a side tarpaulin is its use as a side tarpaulin for an articulated lorry, in which case the height of the side tarpaulin can be approximately 3 metres. The side tarpaulin is placed as the sidewall of the swap body in such a way that the reinforced areas reach from top to bottom. When the supporting structure of the side tarpaulin is a woven fabric in which reinforced areas have been formed with the weft yarns, the direction of the warp of the fabric will run substantially parallel to the direction of the vehicle.
The present invention is not limited to what is described above, but it may vary within the scope of the patent claims. For example, reinforced areas may be separately woven tapes that are attached to the side tarpaulin in an appropriate manner. The weave, density, and materials of the woven supporting structure may differ from those described above. Yarns containing special high-strength fibres are not necessarily formed solely of high-strength fibres, but there may be other fibres mixed into the yarn. The most important feature of the present invention is that the supporting structure of the side tarpaulin is reinforced in such a way that it will not bulge more than the permitted amount when loaded.

Claims

Patent claims:
1. A side tarpaulin for a swap body comprising a supporting structure and a layer attached to the supporting structure on both sides of the supporting structure, characterized in that the supporting structure of the side tarpaulin comprises reinforced areas in such a way that its bulge according to the test method DIN 12641 does not exceed 300 mm.
2. A side tarpaulin according to claim 1 , characterized in that its supporting structure is formed of a woven fabric that comprises reinforced areas formed by weft yarns.
3. A side tarpaulin according to claim 1 or 2, characterized in that its supporting structure is formed of a woven fabric that comprises reinforced areas formed by warp yarns.
4. A side tarpaulin according to any one of the preceding claims, characterized in that the reinforced areas contain special high-strength fibres, whose breaking strength is not less than 2700 N/mm2 and whose breaking extension is lower than 5%.
5. A side tarpaulin according to any one of the preceding claims, characterized in that the supporting structure is laminated on both sides with at least one plastic film.
PCT/FI2002/001018 2002-01-11 2002-12-13 A side tarpaulin for a wafter WO2003064209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20020056 2002-01-11
FI20020056A FI112851B (en) 2002-01-11 2002-01-11 Container side cover

Publications (1)

Publication Number Publication Date
WO2003064209A1 true WO2003064209A1 (en) 2003-08-07

Family

ID=8562764

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2002/001018 WO2003064209A1 (en) 2002-01-11 2002-12-13 A side tarpaulin for a wafter

Country Status (2)

Country Link
FI (1) FI112851B (en)
WO (1) WO2003064209A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2049564A (en) * 1979-04-18 1980-12-31 Structure Flex Ltd Vehicle load restraints
GB1600864A (en) * 1977-03-16 1981-10-21 Structure Flex Ltd Curtain-sided vehicle
WO1990001433A1 (en) * 1988-08-04 1990-02-22 Kymmene Oy A tarpaulin
US5763031A (en) * 1997-01-27 1998-06-09 Huang; Jerry J. Cover reinforcement method and product thereof
GB2342890A (en) * 1998-10-22 2000-04-26 Upm Kymmene Corp Tarpaulin cover
US6068042A (en) * 1996-01-19 2000-05-30 Fair International To flexible walls, in particular for vehicle bodywork

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1600864A (en) * 1977-03-16 1981-10-21 Structure Flex Ltd Curtain-sided vehicle
GB2049564A (en) * 1979-04-18 1980-12-31 Structure Flex Ltd Vehicle load restraints
WO1990001433A1 (en) * 1988-08-04 1990-02-22 Kymmene Oy A tarpaulin
US6068042A (en) * 1996-01-19 2000-05-30 Fair International To flexible walls, in particular for vehicle bodywork
US5763031A (en) * 1997-01-27 1998-06-09 Huang; Jerry J. Cover reinforcement method and product thereof
GB2342890A (en) * 1998-10-22 2000-04-26 Upm Kymmene Corp Tarpaulin cover

Also Published As

Publication number Publication date
FI20020056A (en) 2003-07-12
FI112851B (en) 2004-01-30
FI20020056A0 (en) 2002-01-11

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